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Derivative Financial Instruments and Fair Value Measurements - Additional Information (Details) $ in Millions | Sep. 30, 2020 USD ($) | Sep. 30, 2020 EUR (€) | Dec. 31, 2019 USD ($) | Apr. 30, 2019 EUR (€)
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Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair value measured on a recurring basis |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Deferred compensation plan assets | $ 109.7 |  | $ 107.3 |
Euro-denominated notes | Estimate of fair value measurement | Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying value of long-term debt | 1,092.8 |  | 1,062.5 |
Euro-denominated notes | Carrying value | Significant Other Observable Inputs (Level 2) |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Carrying value of long-term debt | $ 1,049.6 |  | $ 1,002.9 |
Cross-currency swap | Cash flow hedge |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Long-term debt | € |  | € 55,400,000 |  | € 202,300,000
Fixed annual interest rate | 1.143% | 1.143% |  | 1.256%
Designated as hedging instrument | Notes due September 2022 | Euro-denominated notes |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Long-term debt | $ 467.8 | € 400,000,000.0 |  |
Designated as hedging instrument | Notes Due June 2026 | Euro-denominated notes |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |
Long-term debt | $ 581.8 | € 500,000,000.0 |  |

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